High-pressure valve.



H. SLATER.

HIGH PRESSURE VALVE.

APPLICATION FILED AUG. 11. 1913.

1 1 E3 3 Patented June 15, 1915.

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ILLINOIS, ASSIGNQR r o onAaLns r. nLMEs nlvemnn'enIeH-ranssrmn venvn.

To all whom it may} concern: 7 i

I, ,Hanvnr SLATER, a States,residin in Chiof Cook and} tate'of aresubjected to extremely high pressures.

Heretofore great difiiculty has been experienced with valves subjectedto high ill pressure duty on account of the tendency of such valves toleak, and if made large enough to operate easily under workingconditions, the diliiculty of controlling the same readily and rapidly,especially if the working parts are constructed to fl t tightly,

if the liquid employed ment-of any kind, and consequently, as is wellknown, it has become common practice to employ a plurality of valves forhigh pressure duty, one of'sai'd valves to control the inlet and theother to control the outlet -or releasel 1 which permits the One of theprimary objects. of my invention is to provide a high pressure valvewhich can be controlled by the movement of a single operating handle orlever in such gradually in each case, ation and control and amount ofindependent movement is pro vided between certain parts of the valvevalve mechanism to be and at the same time, permlts a certalnamount ofautomatic adjustment of the valve parts.

A further object of the invention is to e means whereby the pressureagainst imtial movement of the valves may be re {The various otherobjects of the invention ,Wlll be more fully set forth in the followingdescription of one form-of valve embodying my invention, together withcertain modrv i Specification of Letters Patent.

new and use V Patented June fl 9. 5,

,Applicationijledhugust 11, $8129.- -Bcrial Ho. 78%,07.

fications thereof, which consists in the new and novel features ofconstruction and combinations of parts hereinafter set forth andclaimed."

In. the drawings nal sectional view of my invention extreme high similarview 1 Figure 1 is a longitudi through a preferred form pressure work,and Fig.- 2 is a Fig. 3 1s a transverse sectional view on the llnes 33of Fig. 1.

ustrated in Fig. 1 of the drawings, there is shown a casing 1, havingone end closed by a screw plug 2, which casing has a pressure inlet 3,a-mach aust 5, disposed .in order longitu of the casing. This-casingmayalso port 6 for connection with a pressure gage indicator.. The bore.of the casing between the inlet 3 and the port 4: has an aperturedpartition 7 forming a guide and seat for the main inlet controllingvalve 8, which valve dinally have a valve 9, the other stem of which isguided in the plug 2 andis engaged by the compression spring 9, whichacts upon the pilot valve and through the pilot valve on main valve 8,tending to maintain the same in Slidably mounted in the sleeve 11 andadapted to be brought into engagement with the 9 and main valve 8 is asliding piston 13, having a passageway 21 extending therethrough andadapted to place the port 4 in fluid communication with the outlet or;exhaust 5. A bonnet 14 is threaded into theend of the casing oppositethe plug 2, the lower end of which bonnet provides a seat 15 forming astop for the upward movement of plunger or piston 13 but it is obviousthat the sleeve 11 may be made integral or 'otherwise'fixed to thebonnet 14 so as to be removable therewith as shown in Fig.2. Extendinand in threaded en 4 ower end which .is

particularly adapted for Q of a modifiedconstruc'tion par-.

Referring particularly to the construction i g through the bonnet l4-formed into an exhaust controlling valve 17, adapted to close fluidcommunication through the passageway 21. The rod 16 may be actuated byany suitable means, and for this purpose a manually actuated handle 18is provided. The length of the piston 13 is so proportioned that themain valve and pilot valve 9 may move into closed position before thepiston engages with the seat 15. .5

Referring particularly to the modified form as shown in Fig. 2, thepilot valve shown in Fig. 1 is omitted, and a stem 20 from the mainvalve 8 is engaged by the spring 9, which tends to maintain the mainvalve normally in closed posit an.

With the parts in the position indicated in Fig. 1, the valves 8 and 9are in position iior closing communication between the inlet 3 andmachine supply port 4. The piston 13 is in engagement with its seat 15,and the valve 17 is in position for closing communication between theport 4. and exhaust Rotating the handle 18 in a direction to move thescrew rod 16 downward moves the plunger ll'l'oli' its seat, and intoengagement with the pilot valve 9, unseating the same and permitting theequalization of pressure on opposite sides of the main valve 8 and thecontinued movement o'lithe plunger 13 will act on the valve 8 to unseatthe same, permitting the full head of pressure to pass the main inletcontrolling valve. At this time, the valve 17 is in position, closingcommunication between the port 4: and exhaust 5.

The actuating oi the handle to move the screw rod 16 in the oppositedirection will permit the pressure from the supply port 3 to act on theplunger to move the same toward its seat, thus permitting the inletvalve to be seated by the compression spring 9. This inlet valve iscompletely seated, preferably just before the plunger 13 reaches.

its seat, and at this time, the valve 17 is in position closing thepassageway 21. A further movement of the rod 16 permits the plunger 13to move into engagement with its seat under the back pressure from themachine supply port, during which time the machine supply port is shutoil from both the inlet and exhaust. A further movement outward of thescrew rod'16 will positively lift, the valve 17 from its engagement withthe plunger 13, permitting fluid communication between' the machinesupply port 4 and the exhaust 5 through the passageway 21.

The operation of the device shown in Fig. l is similar to the term ofdevice shown in Fig. 1, except that the plunger 13 engages directly withthe main inlet controlling valve 8 to open the same against the pressurefrom the inlet without the assistance of a pilot valve. By means of thisconstruction, both the inlet and the outlet valve can be closed and thepressure in the machine held stationary by movement of the handle whichwill permit the inlet valve to close without allowing the plunger torise against its seat on the casing, whereby the outlet valve is alsoheld in engagement with its seat in the plunger. Since an independentstop is thus provided for the plunger, the inlet valve has anindependent movement relative thereto, thus permitting the same to closeautomatically when the pressure against the plunger is released andallowing complete disengagement between these parts for any desiredinterval prior to the instant when the plunger engages with the stop orshoulder in the casing. Consequently, it is possible to pack the plungerin a simple and eflective manner, since the packing is firmly heldbetween the shoulder stationary with respect to the casing, and thusallowing the packing to be arranged so that the pressure from themachine will tend to make a tight joint. The pressure receiving areas,both of 'theinlet valve and the outlet valve, are comparatively small,so that the pressure to be overcome in the movement of these valves iscorrespondingly decreased.

It is obvious that various changes within the skill of the mechanic maybe made-without departing from the spirit of fny invention, provided themeans set forth in the following claims be employed.

I claim as my invention 1. In a valve mechanism, the combination with acasing having a machine supply port, an inlet and an exhaust, and anormally closed valve for said inlet, of a floating piston between saidport and exhaust, means adapted to be moved in one direction to movesaid piston from an inoperative position into engagement with said inletvalve to open the same, an exhaust controlling valve operativelyconnected to said means, said means in one position adapted to form astop for said floating piston in its movement out of engagement withsaid inlet valve and adapted to be moved into another position to permitunseating of said exhaust controlling valve. 7

2. In a valve mechanism, "the combination with an inlet valve, of apiston adapted to engage with and move said valve in one direction tounseat the same, said piston having a movement away from said inletvalve, and having, a passageway there through, a second valvecontrolling said passageway, means For holding said second valve inclosed position and a port adapted to admit back pressure to saidmechanism, said pressure being operable on the release of said holdingmeans for moving said piston out of engagement with said inlet valve.

3. in a valve, a casing having a machine supply port, a pressureexhaust, and an inlet to said supply port, a valve controlling said lingsaid exhaust,

i said the same, a sliding masses inlet, a valve controlling saidexhaust, and a floating piston disposed between said valvesindependently movable relative to said inlet controlling valve andhaving a bore placing said port in communication with said exhaust andcontrolled by said exhaust controlling valve, a stop for limiting themovement of the piston toward the exhaust, and manually controlled meansfor positively moving the exhaust controlling valve into open position.

4. A valve casing having a pressure inlet and a machine supply port, amain closing communication between said inlet and port, said valvehaving a pilot valve for equalizing pressures on opposite sides of saidmain valve, said pilot valve having alined stems projecting beyondopposite sides of the main valve, means for-guiding said stems, a housedspring said guided stems to seat the pilot valve, and a plunger having amovement adapted to act on' the other guided stem longitudinally thereofand on the main valve to unseat both of said valves in succession.

5. In a valve mechanism, the combination with a casing having a machinesupply port, an inlet to said port, a normally closed main valvecontrolling said inlet, a normally closed pilot valve for equalizingpressures between'said port and said inlet, an exhaust from said supplyport, and a valve controlof a screw rod having movement in the directionof movement of said exhaust valve to positively close said exhaustvalve, and to open successively said pilot-valve and said inlet valve,said means having a material movement between the closing of the exhaustvalve and the opening engagement with the pilot valve whereby there Willbe provided a space in the movement of the said means during which allvalves are closed.

6. In a valve mechanism, the combination with a casing having a machinesupply port and an exhaust, a pressure inlet to said port, aself-closing valve controlling said inlet, a housed spring acting onsaid valve to close plunger adapted to engage said valve to actuate thesame, said plunger and valve capable of movement relative to each otherin the direction of the seating and'unseating movement of the valve, ascrew rod for holding said plunger in engagement with said valve to openthe same and for holding the valve in open position against the actionof said spring.

7. In a valve mechanism, the rombination with a casing having a boreextending therethrough, a machine supply p )1't, a pressure inlet and anexhaust communicating with bore, a screw plug closing one end oi saidbore, an inlet controlling valve supported by said plug, a bonnet havinga screw rod closing the other end, a guiding sleeve valve for acting onone of Within said bore between said bonnet and said port, a floatingpiston guided in said sleeve and adapted to engage said inlet valve toactuate the same and an exhaust controlling valve iixed to said screwrod and adapt ed to actuate said piston.

8. In .a valve mechanism, the combination with a casing having a boreextending there through provided with a machine supply port, a. pressureinlet and an exhaust leading to said bore, of a screw plug closing oneend of said bore, an inlet controlling valve sup ported by said plug, abonnet havinga screw rod closing the other end, said bonnet hav 111g apiston seat, apiston floating between said port and seat and adapted toactuate said inlet controlling valve, an exhaust controlling valveadapted to be moved by said screw rod to unseat said piston and actuatesaid inlet controlling valve.

9. In a valve mechanism, the combination with a casing having a boreextending there through, a machine supply port, a pressure inlet and anexhaust leading to said bore, of a spring pressed inlet controllingvalve in said bore between said inlet and port, a floating piston insaid bore having a passageway extending therethrough for placdug saidport in fluid communication With said exhaust. and a. manuallycontrolled valve for said passageway adapted to move said piston intoposition to engage said inlet controlling valve to open the same.

10. In a valve mechanism, the combination with a casing having a machinesupply port. a pressure inlet and combination, in axial mally closedspring valve, a stop for said valve, a floating piston having means forplacing said port in eommunication with said exhaust, stop for saidpiston disposed between the same and said exhaust, an exhaustcontrolling valve, and a screu rod adapted to actuate said exhaustcontrolling valve to and from its exhaust closing position and to movesaid pis ton out of engagement with said stop and into engagement withsaid inlet controlling an exhaust, of the allnement, of a norvalve.

11. in a valve mechanisn'r, a casing haviu a bore extendinetl nrous h,an evluiust port and an outlet to bore. a. valve for said outlet,manually controlled means for holding aid valve n T'fll'lOllS pos onsclosing said exhaust port, one end bore being enlarged to form a,slui-ulder hetu'ccn the xhaust port and outlet, a flange packing lappingthe edge of said shoulder, an insert disposed in the enlarged portion ofsaid hore.and having its inner end positinned on one flange of saidpacking to hold the same in place, and a. plunger having a passagewaytheretl'arough providing communication between said exl aust port andoutlet, said plunger being slidably mounted pressed inlet controlling Iin said insert and movable toward and from the set positions of saidvalve thereby to control said passageway and said plunger having aportion extending therefrom and movable through another flange of saidpacking, said last named flange filling the space between said plungerand wall 01 the bore to prevent leaking past the outside of the plunger.

12. In a valve mechanism, a casing having a bore extending therethrough,a screw plug closing one end of said bore, an insert having a screw rodclosing the other end, said casing having a machine supply port and apressure inlet port, the bore being reduced between said ports to form avalve seat,'a

main valve bearing on said seat, an auxiliary valve within said mainvalve resiliently supported from said screw plug and removabletherewith, a piston carried by said insert and removable therewith, saidpiston adapted to be moved by the actuation of said screw rod intoposition to open said auxiliary and main valves in succession, anexhaust port from said bore and a valve for controlling said exhaustport operatively connected to said screw rod.

This specification signed and witnessed July,A. D. 1913.

i M. K. K. SMITH,

J. W. SMiTH.

